The employee occasionally works in high precarious places, in outside weather conditions, and with explosives and is occasionally exposed to wet and/or humid conditions, fumes or airborne particles, toxic or caustic chemicals, extreme cold and heat, risk of radiation and vibration. While performing the duties of this job, the employee is required to stand, walk, sit, use hands to finger, handle or feel objects, tools or controls, reach with hands and arms, climb or balance, stoop, kneel, crouch or crawl, talk or hear, and taste or smell.